Description of  inflatable rubber formworks/mandrel :

 

Rubber Inflatable Airbag is a kind of production of processed polymeric materials. It is formed by two layers of synthetic rubber and one layer of high-tenacity synthetic fibre fabric in the middle as compression stress structure; it is vulcanized as various sizes and shapes of pressure-proof Rubber Inflatable Airbags.

 

Application of   inflatable rubber formworks/mandrel :

It can substitute the wooden or steel mandrel used for pouring the hollow of large reinforced concrete structure. It is widely used in bridge construction, irrigation works and tunnels.

 

Features of   inflatable rubber formworks/mandrel :

 

1.High compression strength

2.High elasticity

3.Strong air tightness

4.Used repeatedly for many times

5.Lower cost

 

Technical parameters of inflatable rubber formworks/mandrel :

 

Items	Index
Terence of Thickness, mm	3.2±0.2
Hardness(Shore A)	65±5
Adhesive tension of rubber and fabric,N/25mm	≥8
Tensile strength, MPa	≥12
Elongation at break, %	≥350
300% Stretch set length, MPa	6
Stretch for deformation ratio	≤20 %(Prevent distortion)
Suitable temperature,°C	-10~80
Appearance	No cracks, no bubbles on the surface, the length of impuritiestrace is not more than 3mm, the depth is not more than 1.5mm, and quantity of the trace is not more than one. The deformation is not more than 2mm.

 

 

Types o inflatable rubber mandrel :

 

It can not only save materials, but also has the shape characteristics, as it could be round, rectangle, octagon, hexagon, trapezoidal pipeline, etc. 

Schematic cross section for pneumatic rubber core model: